Add config entries for polygonal region points limit

src/main/java/com/sk89q/worldedit/LocalConfiguration.java

@@ -82,6 +82,8 @@ public abstract class LocalConfiguration {
     public Set<Integer> disallowedBlocks = new HashSet<Integer>();
     public int defaultChangeLimit = -1;
     public int maxChangeLimit = -1;
+    public int defaultMaxPolygonalPoints = -1;
+    public int maxPolygonalPoints = 20;
     public String shellSaveType = "";
     public SnapshotRepository snapshotRepo = null;
     public int maxRadius = -1;